{
  "manageEntity": {
    "action": "Save",
    "entityId": "120591390",
    "entityType": "Track",
    "nonce": "0xb2ccbc8764eff14e100612efcf13f7d17d96da4c6a19be87bae939aa489ce70b",
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    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}